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About the Cover:On the cover: The uniformed silica nanoparticles bearing sensitizer (fluorinated tetraphenylporphyrin platinum) and covalently- connected emitter (siloxane derivatized 9,10-diphenylanthracene) were constructed by micellar template method. The preparation of the water-stable nanoparticles is straightforward. Efficient upconversion emission based on triplet-triplet annihilation was achieved in water. [Wu, Lizhu et al. on page 41-46.]
On the inside back cover: Adding carbon nanotubes to low Pt loading catalyst layers improves the utilization of Pt catalysts and mass transfer of reactant and product, as well as decreasing of the contact resistance between catalytic layers and gas diffusion layers, which obviously enhances the performance of proton exchange membrane fuel cell. [Lu, Shanfu et al. on page 47-53.]
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